Series exploring topical scientific issues and their effects for the future
- Programmes:
- on BBC iPlayer (6)
- coming up (2)

Series exploring topical scientific issues and their effects for the future
Watch now (60 minutes)
Available since last Monday with 1 day left.
Alan Davies attempts to answer the proverbial question: how long is a piece of string?
Watch now (60 minutes)
Available since Tue, 10 Nov 2009 with 1 day left.
Horizon investigates speech, a phenomenon unique to humans, which remains a mystery.
Watch now (60 minutes)
Available since Tue, 3 Nov 2009 with 1 day left.
What was there before the Big Bang? Black holes could hold the answer.
Watch now (60 minutes)
Available since Tue, 27 Oct 2009 with 1 day left.
Three people with untreatable conditions see if, within their lifetime, they can be cured.
Watch now (60 minutes)
Available since Tue, 20 Oct 2009 with 1 day left.
The search for answers to one of science's greatest mysteries: how do we know who we are?
Have a look at the old Horizon web pages to watch clips and interviews from previous programmes
1 more programme coming up in the next 7 days (including repeats).
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